High-capacity shock-absorbing mechanism



Patnted July 8, 1919.

INVENTOR. ven/Jid n r l Jr e .mvu /f/ s n w I nu;

A TTORN S. l. STRID. HIGH CA-ACITY SHOCK ABSOHBING MECHANISM. APmcmou man :uw 2s. ma. 1,308,965.

, NN HI QN NSN vu WNW UNITED STATES PATENT OFFICE.

SVEN J, STRID, 0F CHICAGO HEIGHTS, ILLINOIS, ASSIGNOR T0 WILLIAM H. MINER, 0F CHAZY, NEW YORK.

HIGH-CAPACITY SHOGK- ABSORBING MECHANISM.

Specification of Letters Patent.

Application tiled July 25, 1918. Serial 110.246.671.

To M! wlmi/i 'it 'muy concern.'

Be it known that I, SvnN J. Qi'i'inii, a citizen of the llnited States, residing at Chicago lleights, in the county of Cook and State of Illinois, have invented a certain new and useful Improvement in lligh Capacity Sllock-Absorhing Mechanisn'i, of which the following is a` full, clear. concise, and exact description, reference being had to the ai:- coinpanying drawings, forming a part of this specification.

'This invention relates to improvements in high capacity shock absorbing mechanism.

One object of this invention is to provide a high capacity friction shock absorbing mechanism, especially adapted for railway draft riggings.

More specifically, one object of the invention is to provide a friction shock alisoibing mechanism embodying friction shoes. wedge elements and spring means so arranged that the friction shoes are directly resisted in their movement by one, spring means and a frictional wedge action induced by an independent spring means.

In the drawings forming a` part of this specification, Figure 1 is a longitudinal` sectional view of a portion of a railway draft rigging. showing my iiniii'ovements in eonnectipn therewith. Fig. 2 is a vertical, transverse, sectional view taken on the line. @#2 of Fig. 1. ;\iid Fig. 3 is a view siiiiilai to Fig. 1 showing the position assumed by the parts under full comiiression.

ln said drawings, 10-10 denote channelshaped draft sills of a railway car, to the inner faces of which are secured front lugsll and rear lugs 1Q with which coi'iperate front. follower 13 and rear follower 14, respectively. The draw bar of the draft rigging is indicated at 15 and is operatively associated with the shock absorbing mechanism proper by a suitable yoke 16 and all parts are supported by a detachable saddle plate. 1.7.

The improved shock absorbing mechanisin, as shown, is interposed between the followers and comprises. broadly, a` friction shell A, a sci-ics of friction shoes B, spring C, a Second spring D. a post E. wedge elenientsF and follower (l. The shell and its associated arts are centered by means of suitable guide plates 18-18 on the inner faces of the sills.

The shell A is in the forin of a casting of Patented J lily 8, i919.

substantially cylindrical exterior form and has a` friction shell proper cud, an integral spring casing and integral rear a1 its forward at its rear end wall l. On its inner side, the shell A is provided with a series of plain friction fi iccs 'BHs-2() arranged in the. forni of an octagn'n, as clearly shown in Fig. 2.

llach of the frfcti its outer side with faces 21-121 disposed at such an on shoes l is formed on a pair of friction surangle. that the sili'faccs 2l will cooperate with two adiacent surfaces )tl of the shell.

.\t its inner end. each shoe li is formed with an inturned tiaiige. as in dii-ated at to engage the forward eiid of the spring (l which is interposed between and the rear wall 1 the ends of the shoes l5 .1 of the shell A. Each shoe l5 is further provided on its inner side with an inclined we dging surface or face 23 beginning near the inner end of the shoe and with which cot hers lf` one for ea( iper-ate the. wedge inein- Ih shoe, as clearly indicated in the drawinfr.

'l`he post E is shown as a` detachablel with respect to the A. .\t its for'ward viiled with a series of hollow casting friction shell end. the post E is pro wedge surfaces 24u-24 corresponding n number to the number of friction shoes.

rl`hc wedge iiieiiihers F are provided on their ends with corresponding wei i ge post bers l" are formed with wedge surfaces 1211--124- coperable with the ()n their oiitcr sides. the wedge menicoi'iperahle witlrthc corresponding wedge faces 2? of tlie friet ward ends. the wedge members lf with additional wei a lri'espondingly on spring follower( On their forare formed ige faces 25 that engage torined wedge face 26 il. said follower G having ion shoes.

a hollow stud 27 on which is positioned the spring l). .\t their l are provided w forward ends, the shoes ith inturned fianges 28 against which bears the spring l), the construction and arrangement leaving a chamber of the shoes B cent1-all thereof within which are mounted the Spring D` follower (l. and wedge members F.

Assuming the parts in normal or full release position as sl movement of the draw bar will' shoes B lengthwise 1, inward force the In this resisted iowa in Fig.

of the shell A.

by the spring C without any tendency of the latter to affect,

the friction between the cated between the outer and engaging t said shoes and shoes B and shell A. As the shoes B move inwardly, as above described, it is evident that the spring l) will also be simultaneously' compressed from its left hand end as viewed in Fig. 1. Furthermore, inward movement of the shoes B forcesl the wedge members F inwardly toward the center line of the gear as the inclined faces 23 of the shoes slide over the corresponding faces 123 of the members F. Not only will the members I" be forced inwardly or laterally but, on account of the wedge-shaped end of the post E, will be forced forwardly and this movement in turn is transmitted to the follower (i so that the spring D is also compressed from its inner end. In this manner, the spring mounted within the slices is utilized to create theradial or lateraLpi-cssure from the slices to the shell. In release, it will be seen that both springs C and D act in unison to throw the shoes outwardly which is of importance in insuring certain release of the parts.

From the preceding description, it will be seen that the shock absorbing mechanism is of high capacity, unusually compact and so designed as to insure certain release.

claim:

1. In a friction shock absorbin mechanism, the combination with a friction shell, of a plurality of friction shoes slidable longitudinally of said shell, tandem arranged springs, one of said springs having its outer end directly engaged b said shoes at their rear ends and the ot er of said springs having its outer end directly engaged by the front ends of said slices, lat` eral pressure-creating means coacting with said shoes and including an element stationary with respect to the shell and elements disposed within and engaging the interior faces of said shoes, said spring that is engaged by the front ends of said shoes having its inner end engaging also one of said elements within the slices.`

2. In a friction shock absorbin mechanism, the combination with a friction shell, of a post disposed Withinthe shell, friction 5slices coperable with and movable lengthwise relatively to the shell, a spring loends of said shoes and said post, and friction-creatin means interposed between the adjacenten of said spring and post. f

3. In a friction shock absorbing mechawith a friction shell having a centrally disposed post therein, of a plurality of friction shoesfinovable lengthwise of said shell rand arranged so as to leave a chamber centrall b thereof, said slices being provided with wedge faces on their inner sides, a s ring surrounding said post e inner ends of said shoes, a plurality of wedge-acting members within coperable with the adjacent end of the post and the wedge faces of the shoes, a spring follower coperable with said wedge members, and a spring interposed between said spring follower and the friction slices.

4. In a friction shock absorbing mechanism, the combination with a friction shell, of tandem arranged springs one located forwardly of the other, friction shoes coperable with said shell, each of said shoes engaging the forward ends of both of said springs and adapted to compress the latter in the same direc-tion upon relative movement of the slices and shell, and means for forcing said slices into frictional engagement with the shell, said means preventing the inner end of thel forward spring from moving inwardly of the shell when the shoes move inwardly relatively thereto.

5. In a friction shock absorbing mechanism, the combination with a friction shell, of tandem spi-ings one disposed forwardly of the other, friction shoes coperable with said shell, each of said slices engaging the forward ends of both springs, and means for forcing said shoes into frictional engagement with the shell, said means includin an element stationary with respect to the s ell during relative movement of the shell and sheesh 6. In a friction shock absorbing mechanism, the combination with a friction shell, of tandem arranged springs one located forwardly of the other, friction shoes coperable with said shell, each of said shoes engaging the forward ends of both springs7 and friction wedge elements coperable with said shoes for forcing the latter'into frictional engagement with the shell, one of Mid elements being movable forwardly and engaging the inner end of said forward sprin whereby the latter is compressed from bot ends simultaneously when the shoes are moved inwardly relatively to the shell.

7. In a friction shock absorbin mechanism, the combination with a frictlon shell, of a plurality of friction shoes coperable with said shell and slidable relativel thereto, said shoes when assembled wit in the shell forming a. chamber on'their interior, a spring disposed Within said chamber, Said shoes having direct engagement with one end of said spring, and means, including elements within and movable relatively to said shoes, acting on the opposite end of said spring, said spring being compressed simultaneously from both ends upon movement of .the shoes relatively to the shell.

8. In a friction shock absorbin mechanism, the combination with a friction shell, of a plurality of friction shoes di osed within said shell and having a cham er formed on their interior when the shoesare assembled Within the shell, a Spring diSpOSed within said chamber, said shoes having direct engagement with one end of said spring, and devices, including means stationary with respect to the shell and elements withln the shoes coperable therewith, acting on the opposite end of said sprin the latter being compressed simultaneously from both ends upon actuation ofthe shoes relatively to the shell.

In a friction shock absorbing mechanism, the combination with a friction shell, of a pluralit of friction shoes coperable with said she l and slidable relatively thereto, said shoes when assembled Within the shell forming a chamber on their interior, a spring disposed Within said chamber, said shoes having direct engagement with one end of said sprin and means, including elements within an movable relatively to Said shoes, vacting on the opposite end of said spring, said spring being compressed simultancously from both ends upon movement of the shoes relatively to the shell, and a second spring Within the shell also engaged by said shoes at one of its ends and having its other end bearing against the shell.

10. In a friction shock absorbing mecha.-

nism, the combination with e friction shell, of a plurality of friction shoes mounted therein, said shoes forming an interior chamber when assembled, said shoes having interior wedge faces tapered inwardly toward the outer ends of said shoes, Wed es eopernble with said wedge faces of t c shoes, a wedge follower within said chamber and coperable with said wedges, a spring within the chamber having its inner end engaged by said wedge follower, and means stationary with respect, to the shell and eooperahle with said wedges adapted, in conjunction with the shoes upon inward movement of the latter relatively to the shell, to

force said Wedge follower forwardly and` thereby move the inner end of the spring in a direetion opposite to the direction of movement of the shoes.

In witness that I claim the foregoing I have hereunto subscribed my name this 6th day of July, 1918.

SVEN J. STRID.` Witnesses.:

JosErI-r HARRIS, META ScHMm'r. 

